Sensitivity.
For short line situations, the difference probably isn't noticeable.
When my bait is sitting in 25 FOW with a 100 feet of line out with the wind blowing sideways, I want every advantage I can get to detect the lightest bites. The only reason I put up with the price, questionable knot strength, line memory, stretch, etc etc.
Braid has a time and place. For me, it's only around vegetation in short line situations (punching) and topwaters including frogs.
YMMV.
P.S.
I do recall a somewhat funny incident. One afternoon, I was fishing a jerkbait on an 893/ 12# Tatsu. I was missing fish after fish because I was setting the hook too soon (they were not really eating the bait).
Tied the bait on another setup that had braid and leader, and landed almost 100% of the bites the rest of the afternoon.
Sometimes lower sensitivity can be a good thing!